New palaeomagnetic results from the Polish part of the Pieniny Klippen Belt: further evidence for low palaeolatitudes in the Late Jurassic

• Autorzy: Grabowski J. , Krobicki M. , Sobień K.
• Konferencja: International Congress on the Jurassic System (7 ; 06-18.09.2006 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

Middle and Upper Jurassic limestones from the Polish part of the Pieniny Klippen Belt were palaeomagnetically investigated. Samples were collected from four localities: Obłazowa Klippe (Czorsztyn Limestone Formation - Upper Oxfordian), Rogoźnik Klippe (Rogoża Coquina Member of the Czorsztyn Limestone Formation - Kimmeridgian), Krupianka Creek and Baba Klippe (Krupianka Limestone Formation - Upper Bajocian). During thermal demagnetization samples from Rogoźnik Klippe and Obłazowa Klippe indicate one distinct, high temperature component with normal polarity, an inclination ca 40° and a counterclockwise rotated declination of about 20° from the present north. Because the fold tests between Obłazowa and Rogoźnik are positive, we conclude that the obtained direction is pre-folding. Good quality data enable determination of the magnetic remanence age as Mesozoic, Late Jurassic or Early Cretaceous and a palaeolatitude calculation of 22 ± 5°. It might be compared to recently obtained data from the Ukraine section (Veliky Kamenets) of the Pieniny Klippen Belt (Lewandowski et al. 2005), where palaeolatitude for the Late Jurassic (Oxfordian) was estimated as 28 ± 6°. In Baba Klippe one direction with reversed polarity and steep inclination has been defined. Fold test was impossible because the layers are in a horizontal position, but we assume that it is secondary. Component with reversed polarity was acquired probably during thermal changes of rocks related to andesite intrusion (about 300 m to the south) of Sarmatian age. This direction resembles Neogene data with reversed polarity acquired from the Pieniny andesites (Birkenmajer & Nairn 1968; Marton et al. 2004).

Słowa kluczowe

EN

palaeomagnetism; Jurassic; limestones; Pieniny Klippen Belt; Carpathians; Poland

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2006
• Tom: Vol. 4, no. 1
• Strony: 44--44
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Grabowski J.

autor

Krobicki M.

autor

Sobień K.

• Polish Geological Institute, ul. Rakowiecka 4, PL-00975 Warszawa, Poland,

Bibliografia

• 1. Birkenmajer K. and Nairn A. E. M. 1968. Paleomagnetic studies of Polish rocks. III. Neogene igneous rocks of the Pieniny Mountains, Carpathians. Annales de la Societe Geologique de Pologne, 38, 4: 475-489.
• 2. Lewandowski M., Krobicki M., Matyja B. A. and Wierzbowski A. 2005. Palaeogeographic evolution of the Pieniny Klippen Basin using stratigraphic and paleomagnetic data from the Veliky Kamenets section (Carpathians, Ukraine). Palaeogeography, Palaeoclimatology, Palaeoecology, 216: 53-72.
• 3. Marton E., Tokarski A. K. and Halasz D. 2004. Late Miocene counterclockwise rotation of the Pieniny andesites at the contact of the Inner and Outer Western Carpathians. Geologica Carpathica, 55, 5: 411-419.